Preterm babies are generally due to the small gestational age and low weight, and are prone to all kinds of problems after birth, and may even be dangerous. 34-week preterm babies need to meet the following criteria for discharge from the hospital: 1) The weight of the child should be more than two kilograms, and the child’s rate of growth is also satisfactory, especially weight gain is relatively satisfactory. 2) All the child’s medications have been stopped. There is no need for oxygen, and the child’s vital signs are stable.3. The child is already eating a lot of milk, which is sufficient to meet the needs of growth and development.4. The child is able to get out of the warming box, and is able to maintain a stable body temperature and vital signs at room temperature.5. Preterm births are susceptible to retinopathy, and therefore retinal screening for preterm infants should be perfected prior to discharge from the hospital, as well as newborn disease screening, hearing screening, and other tests. Other tests that need to be done are newborn screening, hearing screening and so on.